The interior of earth consists almost entirely of rock. felsic molten solid sedimentary

The correct answer is solid.
In fact, the interior of Earth is divided into core and mantle, with the core being divided into inner and outer core. 
The inner core and the mantle are composed of solid rocks, while only the outer core is in liquid phase. However, since the mantle alone represents about 84% of the total Earth's volume, we can say that the interior of Earth consists mainly of solid rocks.